Kenwood dnx9240bt map update installation tutorial request!

Hello everyone,
I have a Kenwood dnx9240bt unid with gps and garmin software.
I have updated the unit firmware to the latest and the garmin software to the latest.
And now i want to install a new unlocked map City Navigator Europe nt 2013.30, but the unit doesn,t read the sd card and doesn,t see the map.
I will try to put it in the internal memory, but first i want to know what are the steps for this and if someone else has done this before i would highly apreciate if they would give me a short tutorial.

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